CN104280839A - Optical receptacle and optical module - Google Patents

Optical receptacle and optical module Download PDF

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Publication number
CN104280839A
CN104280839A CN201410320195.8A CN201410320195A CN104280839A CN 104280839 A CN104280839 A CN 104280839A CN 201410320195 A CN201410320195 A CN 201410320195A CN 104280839 A CN104280839 A CN 104280839A
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CN
China
Prior art keywords
light
optical
emitting component
receptacle
photo detector
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Granted
Application number
CN201410320195.8A
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Chinese (zh)
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CN104280839B (en
Inventor
棚泽昌弘
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Enplas Corp
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Enplas Corp
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Priority to JP2013142605A priority Critical patent/JP6205194B2/en
Priority to JP2013-142605 priority
Application filed by Enplas Corp filed Critical Enplas Corp
Publication of CN104280839A publication Critical patent/CN104280839A/en
Application granted granted Critical
Publication of CN104280839B publication Critical patent/CN104280839B/en
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Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B6/00Light guides
    • G02B6/24Coupling light guides
    • G02B6/42Coupling light guides with opto-electronic elements
    • G02B6/4201Packages, e.g. shape, construction, internal or external details
    • G02B6/4286Optical modules with optical power monitoring
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B6/00Light guides
    • G02B6/24Coupling light guides
    • G02B6/42Coupling light guides with opto-electronic elements
    • G02B6/4201Packages, e.g. shape, construction, internal or external details
    • G02B6/4204Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
    • G02B6/4214Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical element having redirecting reflective means, e.g. mirrors, prisms for deflecting the radiation from horizontal to down- or upward direction toward a device
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B6/00Light guides
    • G02B6/24Coupling light guides
    • G02B6/26Optical coupling means
    • G02B6/28Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/2804Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers
    • G02B6/2817Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers using reflective elements to split or combine optical signals

Abstract

The present invention relates to an optical receptacle and an optical module. The optical module has the optical receptacle. The optical receptacle and the optical module have a first optical surface which receives incidence of light from a light emitting element, a reflecting surface which reflects the light along a substrate, a light separating section which separates light reflected at the reflecting surface into monitor light and signal light, a second optical surface which emits the monitor light toward a light receiving element, and a third optical surface which emits the signal light toward an optical fiber. The light separating section has a plurality of splitting transmissive surfaces which are vertical surfaces with respect to the optical axis of the light reflected at the reflecting surface and a plurality of splitting reflecting surfaces which are inclining surfaces with respect to the optical axis of the light reflected at the reflecting surface. The splitting transmissive surfaces and the splitting reflecting surfaces are alternately disposed in a first direction and in a second direction.

Description

Optical receptacle and optical module
Technical field
The present invention relates to optical receptacle (optical receptacle) and there is its optical module.
Background technology
In the past, in the optical communication using optical fiber, use the optical module with light-emitting components such as surface-emitting lasers (such as, VCSEL:Vertical Cavity Surface Emitting Laser, vertical cavity surface emitting laser).Optical module has the optical receptacle making to be incident to the end face of optical fiber from the light comprising the communication information of light-emitting component injection.
In addition, as optical module, have and be adjusted to object with what make the output characteristics stabilization of light-emitting component or light output for temperature variation, be configured to the optical module intensity of the light penetrated from light-emitting component or light quantity being monitored to (monitor).
Such as, in patent documentation 1,2, describe the encapsulation type photoelectric conversion device that inside comprises the photo detector of light-emitting component and supervision.In encapsulation type photoelectric conversion device, the windowpane of encapsulation is utilized to make a part for the light penetrated from light-emitting component as supervision light to photo detector lateral reflection.But, if the encapsulation type photoelectric conversion device high-frequency drive recorded in patent documentation 1,2, then sometimes there is the situation owing to producing crosstalk (crosstalk) from the wiring leakage electromagnetic wave be connected with light-emitting component.In this case, the high-speed communication of corresponding more than 10Gbps is difficult to.And then, use the optical module of encapsulation type photoelectric conversion device to be difficult to miniaturization.
In contrast, the board mounting type photoelectric conversion device being provided with light-emitting component at circuit substrate can not produce crosstalk as encapsulation type photoelectric conversion device, have and can cut down parts number of packages, cost and can the advantage such as miniaturization.But board mounting type photoelectric conversion device, owing to not having windowpane, is difficult to possess the function producing and monitor light in light-emitting component side.
For this problem, such as, in patent documentation 3, propose following optical module, that is, be configured at optical receptacle and make a part for the light penetrated from light-emitting component as monitoring the reflecting surface of light to photo detector lateral reflection.Thus, the stable high-speed communication that the output with light-emitting component monitors is achieved.
Prior art document
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication 2000-340877 publication
Patent documentation 2: Japanese Unexamined Patent Publication 2004-221420 publication
Patent documentation 3: Japanese Unexamined Patent Publication 2008-151894 publication
Summary of the invention
In the optical module that patent documentation 3 is recorded, taken out by from optical receptacle from the light of light-emitting component injection in the mode becoming the direction vertical with the substrate of photoelectric conversion device at the end face of optical fiber.But, different according to the use form of optical module, sometimes require the light penetrated from light-emitting component to take out from optical receptacle in the mode become along the direction of substrate at the end face of optical fiber.In this case, the invention diverse ways recorded with patent documentation 3 is needed.
The object of the invention is to, provide and while taking out the supervision light for monitoring light-emitting component, the optical receptacle penetrated to the direction along substrate from the light of light-emitting component injection and the optical module with it can be made.
Optical receptacle of the present invention is configured between photoelectric conversion device and optical fiber, for the end face of light-emitting component and described optical fiber is carried out optical bond (optically coupling), on substrate, described light-emitting component and the photo detector for monitoring the light penetrated from described light-emitting component is configured with in this photoelectric conversion device, this optical receptacle has: the first optical surface, makes the light incidence penetrated from described light-emitting component, reflecting surface, makes to reflect from the light of described first optical surface incidence to the direction along described substrate, recess, it has the injection region making to be penetrated by a part for the light of described reflective surface and the plane of incidence making the light incidence from the injection of described injection region, light separation unit, be configured in described injection region, light by described reflective surface is separated into the flashlight towards the supervision light of described photo detector and the end face towards described optical fiber, described supervision light is reflected to described photo detector, described flashlight is penetrated to described recess, second optical surface, make by described smooth separate section from after described supervision light penetrate to described photo detector, and the 3rd optical surface, make to penetrate from the described flashlight of described plane of incidence incidence to the end face of described optical fiber by from after described smooth separation unit injection, described smooth separation unit has: multiple segmentation transmission plane, makes by the Transmission light of described reflective surface and penetrates to described recess, and multiple segmented reflector face, be formed in the region different from multiple described segmentation transmission plane, and make to be reflected to described second optical surface by the light of described reflective surface, described segmentation transmission plane is the vertical plane vertical with the optical axis of the light by described reflective surface, described segmented reflector face is the dip plane of the inclined light shaft relative to the light by described reflective surface, at the first direction of the vergence direction as described segmented reflector face with along described segmented reflector face and the second direction orthogonal with described first direction, alternately configure described segmentation transmission plane and described segmented reflector face.
Optical module of the present invention has: on substrate, be configured with light-emitting component and the photoelectric conversion device of photo detector for monitoring the light penetrated from described light-emitting component; And the optical receptacle that the present invention relates to.
The optical module with optical receptacle of the present invention can, while monitoring the light penetrated from light-emitting component, make to penetrate from the light of light-emitting component injection to the direction along substrate.
Accompanying drawing explanation
Fig. 1 is the sectional view (index path) of the optical module of embodiment of the present invention 1,
Fig. 2 A, Fig. 2 B are the figure of the structure of the optical receptacle representing embodiment 1,
Fig. 3 A, Fig. 3 B are the figure of the structure representing light separation unit,
Fig. 4 A, Fig. 4 B are the partial enlarged drawings of the structure representing light separation unit,
Fig. 5 is the stereographic map of the light separation unit of the optical receptacle compared,
Fig. 6 A, Fig. 6 B are the figure of the simulation result of the light spot form represented in the light path of flashlight,
Fig. 7 A ~ Fig. 7 C is the sectional view (index path) of the optical module of the variation 1 ~ 3 of embodiment 1,
Fig. 8 A ~ Fig. 8 C is the sectional view (index path) of the optical module of the variation 4 ~ 6 of embodiment 1,
Fig. 9 is the sectional view (index path) of the optical module of embodiment 2,
Figure 10 A ~ Figure 10 C is the figure of the structure of the optical receptacle representing embodiment 2, and
Figure 11 A ~ Figure 11 C is the sectional view (index path) of the optical module of the variation 1 ~ 3 of embodiment 2.
Symbol description:
100,500 optical modules
200,700 photoelectric conversion devices
210 semiconductor substrates
220 light-emitting components
230 photo detectors
240 control modules
300,600 optical receptacles
310 first optical surfaces
320 reflectings surface
330 smooth separation units
331 segmented reflector faces
332 segmentation transmission planes
333 rounding table terraces
334 end faces
340 second optical surfaces
350 the 3rd optical surfaces
360 first recesses
370 second recesses
380 the 3rd recesses
381 planes of incidence
390 optical fiber installation portions
391 the 4th recesses
392 the 5th recesses
400 optical fiber
410 end faces
610 connectors
The light that L penetrates from light-emitting component
Lm monitors light
Ls flashlight
S virtual plane
Embodiment
Below, with reference to accompanying drawing, embodiments of the present invention are described in detail.
[embodiment 1]
(structure of optical module)
Fig. 1 is the sectional view of the optical module 100 of embodiment of the present invention 1.In Fig. 1, in order to represent the light path in optical receptacle 300, eliminate the hacures on optical receptacle 300 section.
As shown in Figure 1, optical module 100 has: the photoelectric conversion device 200 comprising the board mounting type of light-emitting component 220; And optical receptacle 300.Optical module 100 is by being used in optical receptacle 300 connecting fiber 400.Photoelectric conversion device 200 and optical receptacle 300 are fixed by known fixed forms such as bonding agents (such as, heat/uv curing resin).And, optical receptacle 300 to be configured at the state between photoelectric conversion device 200 and optical fiber 400, by light-emitting component 220 end face 410 optical bond with optical fiber 400.
Photoelectric conversion device 200 has semiconductor substrate 210, light-emitting component 220, photo detector 230 and control module 240.
Light-emitting component 220 is configured on semiconductor substrate 210, penetrates laser L to the direction vertical with the surface of semiconductor substrate 210.Light-emitting component 220 is such as vertical cavity planar laser (VCSEL).
Photo detector 230 is configured on the face identical with the face being configured with light-emitting component 220 of semiconductor substrate 210, accepts the supervision light Lm for carrying out monitoring to the output (such as, intensity and light quantity) of the laser L penetrated from light-emitting component 220.Photo detector 230 is such as photodetector (photodetector).
Control module 240 is configured on the face identical with the face being configured with light-emitting component 220 and photo detector 230 of semiconductor substrate 210, is electrically connected with light-emitting component 220 and photo detector 230 by the wiring outside figure.Control module 240, based on the intensity of the supervision light Lm accepted by photo detector 230 or light quantity, controls the output of the laser L penetrated from light-emitting component 220.
Optical receptacle 300 and mode that second optical surface 340 with photo detector 230 relative relative with light-emitting component 220 with the first optical surface 310, is configured on photoelectric conversion device 200.Optical receptacle 300 is made up of translucent material, such as integrally manufactured by ejection formation.Optical receptacle 300 makes the light L penetrated from the light-emitting component 220 of photoelectric conversion device 200 be incident to inside from the first optical surface 310, and light L is separated into supervision light Lm and flashlight Ls.And optical receptacle 300 makes supervision light Lm penetrate from the second optical surface 340 to the photo detector 230 of photoelectric conversion device 200, flashlight Ls is penetrated from the 3rd optical surface 350 to the end face of optical fiber 400.
The principal character of the optical module 100 of present embodiment is the structure of optical receptacle 300.Therefore, optical receptacle 300 is described in addition in detail.
As mentioned above, optical fiber 400 is connected with in optical receptacle 300.Optical fiber 400 is the optical fiber of single mode mode or multi-modal mode.
(structure of optical receptacle)
Fig. 2 A is the vertical view of optical receptacle 300, and Fig. 2 B is the upward view of optical receptacle 300.As depicted in figs. 1 and 2, optical receptacle 300 is the parts of roughly rectangular shape.Optical receptacle 300 uses to be had the material of light transmission to the light of the wavelength used in optical communications and is formed.As the example of this material, comprise the transparent resin such as polyetherimide and cyclic olefin resin.Optical receptacle 300 such as can be integrally manufactured by ejection formation.
First, with six of this rectangular parallelepiped faces (end face, bottom surface, front, the back side, right flank and left surface) for benchmark, the shape of optical receptacle 300 is described.In the following description, the face of optical fiber 400 side of optical receptacle 300 is described as " right flank ".In addition, when when integrally manufactured optical receptacle 300, also taper can be formed in order to the demoulding at right flank and left surface by ejection formation.
As shown in fig. 1 and fig. 2b, the first recess 360 of corner frustum shape is formed in bottom surface.First recess 360 is the spaces holding light-emitting component 220, photo detector 230 and control module 240.The bottom surface of the first recess 360 is parallel with the surface of semiconductor substrate 210.In the bottom surface of the first recess 360, be formed with the first optical surface 310 in the mode relative with light-emitting component 220, be formed with the second optical surface 340 in the mode relative with photo detector 230.In addition, not limiting especially the shape of the first recess 360, such as, also can be rectangular shape.
In addition, the second recess 370 of five corner post shapes and the 3rd recess 380 of roughly five corner post shapes is formed with at end face in the mode arranged at the length direction of rectangular parallelepiped.A part for the medial surface of the second recess 370 plays function as reflecting surface 320.On the other hand, a part for the medial surface of the 3rd recess 380 plays function as light separation unit 330 (incident area), and the medial surface relative with light separation unit 330 plays function as the plane of incidence 381.In addition, for the shape of the second recess 370, as long as reflecting surface 320 can be configured in the position of regulation, do not limit especially.In addition, for the shape of the 3rd recess 380, also, as long as light separation unit 330 and the plane of incidence 381 can be configured in the position of regulation, do not limit especially.
Further, the optical fiber installation portion 390 of the barrel shape for connecting fiber 400 is provided with at right flank.Optical fiber installation portion 390 has: the 4th recess 391 of cylindrical shape; And be formed at the 5th recess 392 of cylindrical shape of bottom surface of the 4th recess 391.4th recess is the position of the hoop (ferrule) 420 of the drum that the end for being arranged on optical fiber 400 is installed.The end of optical fiber 400 is inserted into optical fiber installation portion 390 (the 4th recess 391) with the state being mounted with hoop 420, thus, is configured to parallel with the surface of semiconductor substrate 210.The 3rd optical surface 350 is formed with in the mode relative with the end face 410 of installed optical fiber 400 in the bottom surface of the 5th recess 392.The central shaft of the 3rd optical surface 350 is consistent with the central shaft of the end face 410 of optical fiber 400.
Then, the optics inscape of optical receptacle 300 is described.
As depicted in figs. 1 and 2, optical receptacle 300 has the first optical surface 310, reflecting surface 320, light separation unit 330, second optical surface 340, the plane of incidence 381 and the 3rd optical surface 350.
First optical surface 310 is configured at the bottom surface side of optical receptacle 300 in the mode relative with light-emitting component 220.In the present embodiment, the first optical surface 310 is convex lens.First optical surface 310 makes the light L penetrated from light-emitting component 220 be incident in optical receptacle 300.Now, the light L of incidence is transformed to collimated light (collimated light) L by the first optical surface 310.And, advanced to reflecting surface 320 by the collimated light L after the first optical surface 310 converts.The central shaft of the first optical surface 310 is vertical with the light-emitting area (and surface of semiconductor substrate 210) of light-emitting component 220.Preferably, the central shaft of the first optical surface 310 is consistent with the optical axis of the light L penetrated from light-emitting component 220.
Reflecting surface 320 is the dip plane formed in the top surface side of optical receptacle 300.Reflecting surface 320 is to tilt near the mode of optical fiber 400 gradually towards end face along with the bottom surface from optical receptacle 300.In present embodiment, relative to the optical axis of the light L from the first optical surface 310 incidence, the angle of inclination of reflecting surface 320 is 45 °.For reflecting surface 320, carry out inside incidence from the collimated light L of the first optical surface 310 incidence with the incident angle larger than critical angle.Reflecting surface 320 makes incident light L be totally reflected to the direction on the surface along semiconductor substrate 210.
Light separation unit 330 (incident area of the 3rd recess 380) is the region formed by multiple, is configured at the top surface side of optical receptacle 300.Collimated light L after being reflected by reflecting surface 320 is separated into the flashlight Ls of the supervision light Lm towards photo detector 230 and the end face 410 towards optical fiber 400 by light separation unit 330.Flashlight Ls penetrates to the 3rd recess 380.The main feature of the optical module 100 of present embodiment is the light separation unit 330 of optical receptacle 300.Therefore, for light separation unit 330, be described in detail in addition.
Second optical surface 340 is configured at the bottom surface side of optical receptacle 300 in the mode relative with photo detector 230.In present embodiment, the second optical surface 340 is convex lens.Second optical surface 340 makes to assemble backward photo detector 230 by the collimated light L after light separation unit 330 is separated and penetrates.Light Lm is monitored thereby, it is possible to combine efficiently at photo detector 230.Preferably, the central shaft of the second optical surface 340 and the sensitive surface (semiconductor substrate 210) of photo detector 230 vertical.
The plane of incidence 381 is configured in the top surface side of optical receptacle 300, and the flashlight Ls penetrated by light separation unit 330 is incident in optical receptacle 300 again.In present embodiment, the plane of incidence 381 is the vertical plane vertical with the flashlight Ls be isolated to by light separation unit 330.Thereby, it is possible to do not make reflect towards the flashlight Ls of the end face 410 of optical fiber 400 and make it be incident in optical receptacle 300.
3rd optical surface 350 is configured at the right flank side of optical receptacle 300 in the mode that the end face 410 with optical fiber 400 is relative.In present embodiment, the 3rd optical surface 350 is convex lens.Penetrate towards the end face 410 of optical fiber 400 after 3rd optical surface 350 makes the flashlight Ls (collimated light L) be incident in optical receptacle 300 from the plane of incidence 381 assemble.Thereby, it is possible at the end face 410 binding signal light Ls efficiently of optical fiber 400.Preferably, the central shaft of the 3rd optical surface 350 is consistent with the central shaft of the end face 410 of optical fiber 400.
In the optical receptacle 300 of present embodiment, being transformed to beam diameter owing to the light penetrated from light-emitting component 220 L to be utilized the first optical surface 310 is make it incident after certain collimated light (directional light), therefore only can process collimated light.Thus, even if produce the scale error on collimated light L, Ls, Lm direct of travel at optical receptacle 300, the position towards the light quantity of the light of the end face 410 of optical fiber 400 and photo detector 230 and the focal point towards the incident light of optical fiber 400 and photo detector 230 also can be guaranteed.Its result, can relax and improve ease of manufacturing to the dimensional accuracy required by optical receptacle 300 while maintenance optical property.
Then, the structure of light separation unit 330 is described.Fig. 3 and Fig. 4 is the figure of the structure representing light separation unit 330.Fig. 3 A is the stereographic map of light separation unit 330, and Fig. 3 B is the vertical view of light separation unit 330.Fig. 4 A is the enlarged fragmentary cross section in region represented by dashed line in FIG, and Fig. 4 B is the enlarged fragmentary cross section of the light path representing light separation unit 330.In order to represent the light path in optical receptacle 300 in Fig. 4 B, eliminate the hacures on the section of optical receptacle 300.
As shown in Figure 3 and Figure 4, light separation unit 330 has multiple segmented reflector face 331, multiple segmentation transmission plane 332, multiple rounding table terrace 333 and multiple end face 334.Segmented reflector face 331, segmentation transmission plane 332 and rounding table terrace 333 is alternately configured to become rectangular mode at first direction and the second direction orthogonal with first direction.At this, so-called " first direction " is the vergence direction (with reference to the arrow D1 shown in Fig. 3) in segmented reflector face 331 described later.In addition, so-called " second direction " is direction (with reference to the arrow D2 shown in Fig. 3) along segmented reflector face 331 and orthogonal with first direction.
Segmented reflector face 331 is dip plane of the inclined light shaft relative to the light L reflected by reflecting surface 320.Segmented reflector face 331 is to tilt near the mode of optical fiber 400 gradually towards bottom surface along with the end face from optical receptacle 300.In present embodiment, relative to the optical axis of the light L reflected by reflecting surface 320, the pitch angle in segmented reflector face 331 is 45 °.Multiple segmented reflector face 331 is configured on same plane.In addition, segmented reflector face 331 configures with the interval of regulation at first direction and second direction.Between the segmented reflector face 331 that first direction is adjacent, be configured with segmentation transmission plane 332 and rounding table terrace 333.On the other hand, between the segmented reflector face 331 that second direction is adjacent, be configured with the end face 334 of segmentation transmission plane 332, rounding table terrace 333 and a pair.Do not limit the interval between the segmented reflector face 331 in first direction and second direction especially.In present embodiment, the interval between the segmented reflector face 331 in first direction and second direction is identical.
Segmentation transmission plane 332 is that be formed at the position different from segmented reflector face 331, vertical with the optical axis of the light L reflected by reflecting surface 320 vertical planes.Segmentation transmission plane 332 also configures with the interval of regulation at first direction and second direction.Multiple segmentation transmission plane 332 configures in the mode be parallel to each other at first direction, is configured on same plane in second direction.
Rounding table terrace 333 is faces parallel with the optical axis of the light L reflected by reflecting surface 320, is connected in segmented reflector face 331 with segmentation transmission plane 332.Rounding table terrace 333 also configures with the interval of regulation at first direction and second direction.Multiple rounding table terrace 333 configures in the mode be parallel to each other at first direction, is configured on same plane in second direction.
End face 334 is faces parallel with the optical axis of the light L reflected by reflecting surface 320, and is the face vertical with rounding table terrace 333 with segmentation transmission plane 332.End face 334 is configured in the two ends of the second direction of segmentation transmission plane 332 and rounding table terrace 333, is connected by segmentation transmission plane 332 with the two ends of rounding table terrace 333 with segmented reflector face 331.Multiple end face 334 is configured on same plane at first direction, configures in the mode be parallel to each other in second direction.
Between segmentation transmission plane 332 and rounding table terrace 333, be formed with crest line.The multiple crest lines adjoined at first direction configure in the mode be parallel to each other.And the multiple crest lines adjacent in second direction configure on the same line.In present embodiment, in the angle that segmentation transmission plane 332 and rounding table terrace 333 are formed, less angle is 90 °.In addition, splitting less angle in the angle of transmission plane 332 and segmented reflector face 331 formation is 135 °.In addition, in the angle that formed of rounding table terrace 333 and segmented reflector face 331, less angle is also 135 °.That is, segmentation transmission plane 332 and rounding table terrace 333 are formed as the rectangle of same shape.
As shown in Figure 4 B, the light L reflected by reflecting surface 320 carries out inside incidence with the incident angle larger than critical angle to segmented reflector face 331.Segmented reflector face 331 makes incident light L generate to the second optical surface 340 reflection and monitors light Lm.On the other hand, segmentation transmission plane 332 makes the light L transmission of being reflected by reflecting surface 320, generates towards the flashlight Ls of the end face 410 of optical fiber 400.Flashlight Ls penetrates to the 3rd recess 380.Now, because segmentation transmission plane 332 is vertical planes vertical with light L, so flashlight Ls does not reflect.In addition, because rounding table terrace 333 and end face 334 are formed as parallel with the incident direction of light L, therefore, light L is not incident to rounding table terrace 333 and end face 334.
Be not limited to light separation unit 330 the flashlight Ls generated and the light amount ratio monitoring light Lm especially.Flashlight Ls with monitor that the light amount ratio of light Lm is with proportional relative to the area ratio of the segmentation transmission plane 332 of light L and segmented reflector face 331 that are incident to light separation unit 330.Such as, by the section shown in Fig. 4 B with on the parallel direction of segmentation transmission plane 332, the ratio of the size d2 in the size d1 of splitting transmission plane 332 and segmented reflector face 331 is assumed to be 1:1.In this case, when the light being incident to light separation unit 330 is set to 100%, generates flashlight Ls by each 50% and monitor light Lm.
Then, the reason configuring segmented reflector face 331 and segmentation transmission plane 332 in the mode replaced at first direction and this both direction of second direction is described.
As mentioned above, Fig. 3 A is the stereographic map of the light separation unit 330 of the optical receptacle 300 of present embodiment.On the other hand, Fig. 5 is the stereographic map of the light separation unit 330' compared.Fig. 6 A is the simulation result of the beam spots shape of flashlight Ls on virtual plane S when using the light separation unit 330' that compares to generate flashlight Ls.Fig. 6 B is the simulation result of the beam spots shape of flashlight Ls on virtual plane S when using the light separation unit 330 of present embodiment to generate flashlight Ls.In this emulation, as shown in Figure 1, near the plane of incidence 381, virtual plane S is set.
As shown in Figure 5, the vergence direction of the light separation unit 330' compared only in segmented reflector face 331 alternately configures segmented reflector face 331 and segmentation transmission plane 332, different from the light separation unit 330 of present embodiment in this.If use the light separation unit 330' compared, then as shown in Figure 6A, beam spots becomes candy strip.
If in contrast, use the light separation unit 330 of present embodiment, then as shown in fig. 6b, beam spots becomes matrix pattern.In addition, the plan view shape due to the 3rd optical surface 350 is circular, and therefore, the cross-sectional profile arriving the flashlight Ls of the end face 410 of optical fiber 400 is circular.In addition, beam spots when owing to employing the light separation unit 330 of present embodiment is matrix pattern, therefore, compared with using the situation of the light separation unit 330' compared, optical receptacle 300 is not easy the impact of the angular intensity distribution being subject to light-emitting component 220.
(effect)
As previously discussed, in the optical receptacle 300 of embodiment 1, utilize reflecting surface 320 to make the laser L penetrated from light-emitting component 220 after the surface reflection of semiconductor substrate 210, by by the reflection in segmented reflector face 331 and the transmission by segmentation transmission plane 332, be separated into and monitor light Lm and flashlight Ls.For supervision light Lm, make it penetrate to photo detector 230 from the second optical surface 340, for flashlight Ls, do not change its direct of travel and make it penetrate from the 3rd optical surface 350 to the end face 410 of optical fiber 400.Thus, optical receptacle 300 can while obtaining the supervision light Lm that monitor the light penetrated from light-emitting component 220, makes the direction of the flashlight Ls on the end face 410 of optical fiber 400 be direction along semiconductor substrate 210.In addition, optical receptacle 300 is not easy the impact of the angular intensity distribution being subject to light-emitting component 220.
(variation)
In the optical receptacle 300 of embodiment 1, the light of incidence is transformed to collimated light by the first optical surface 310, but the light of incidence also can be transformed to the light beyond collimated light by the first optical surface 310.
Fig. 7 is the sectional view (index path) of the optical module 100 of the variation 1 ~ 3 of embodiment 1.Fig. 7 A is that the first optical surface 310 converts laser L to make the index path along with the optical module 100 when beam diameter of advancing increases gradually.Fig. 7 B, Fig. 7 C are that the first optical surface 310 converts laser L to make the index path along with the optical module 100 when beam diameter of advancing reduces gradually.In Fig. 7 A ~ Fig. 7 C, in order to represent the light path in optical receptacle 300, eliminate the hacures on the section of optical receptacle 300.The optical receptacle 300 related to for these variation and optical module 100, its beam diameter in optical receptacle 300 of light L penetrated from light-emitting component 220 is different from the optical receptacle 300 of embodiment 1 and optical module 100.In addition, for the inscape that the optical receptacle 300 with embodiment 1 is identical with optical module 100, also the description thereof will be omitted to be marked with identical symbol.
As shown in Figure 7 A, in the optical module 100 of variation 1, the first optical surface 310 converts laser L to make along with beam diameter of advancing increases gradually.By weakening the positive focusing force (lens power) (refracting power) etc. of the first optical surface 310 (convex lens) relative to the structure of embodiment 1, such structure can be realized.Thus, its diameter is expanded along with advancing due to flashlight Ls can be made, even if therefore when adhering to foreign matter or form defect on the 3rd optical surface 350, the area ratio/occupancy ratio of the foreign matter/defect on the 3rd optical surface 350 relative to flashlight Ls also can be reduced.Thereby, it is possible to effectively relax the impact that the foreign matter/defect on the 3rd optical surface 350 brings joint efficiency.
In addition, as shown in Figure 7 B, in the optical module 100 of variation 2, the first optical surface 310 converts the light beam of laser L to make along with beam diameter of advancing towards direct of travel reduces gradually.By strengthening the positive focusing force (refracting power) etc. of the first optical surface 310 (convex lens) relative to the structure of embodiment 1, this structure can be realized.
And then, as in fig. 7c, in the optical module 100 of variation 3, owing to effectively having assembled light L before arrival the 3rd optical surface 350, therefore, as long as light L is undertaken assembling by the 3rd optical surface 350 that focusing force (refracting power) is less.
In addition, in the optical receptacle 300 of embodiment 1, illustrate the situation that the first optical surface 310, second optical surface 340 and the 3rd optical surface 350 are the lens faces with curvature, but the first optical surface 310, second optical surface 340 or the 3rd optical surface 350 also can be the planes not having curvature.
Fig. 8 is the sectional view (index path) of the optical module 100 of the variation 4 ~ 6 of embodiment 1.The index path of the optical module 100 that Fig. 8 A is the first optical surface 310 when being plane.The index path of the optical module 100 that Fig. 8 B is the second optical surface 340 when being plane.The index path of the optical module 100 that Fig. 8 C is the 3rd optical surface 350 when being plane.In Fig. 8 A ~ Fig. 8 C, in order to represent the light path in optical receptacle 300, eliminate the hacures on the section of optical receptacle 300.
As shown in Figure 8 A, in the optical module 100 of variation 4, the first optical surface 310 is formed as plane.In this case, such as, reflecting surface 320 is formed as to play function as concave mirror.
In addition, as shown in Figure 8 B, in the optical module 100 of variation 5, the second optical surface 340 is formed as plane.In this case, the sensitive surface of photo detector 230 is not likely arrived from the light of a part for the second optical surface 340 injection.But, photo detector 230 the light L penetrated from light-emitting component 220 is monitored in, do not become large problem.
And then as shown in Figure 8 C, in the optical module 100 of variation 6, the 3rd optical surface 350 is formed as plane.When light L before effectively having assembled by arrival the 3rd optical surface 350 by the first optical surface 310 or reflecting surface 320 etc., the 3rd optical surface 350 also can be formed as plane.
[embodiment 2]
(structure of optical module)
The optical receptacle 600 of embodiment 2 and optical module 500 are lens arra types, and it can the hyperchannel that sends of the corresponding light with monitoring, different with optical module 100 from the optical receptacle 300 of embodiment 1 in this.In addition, for the inscape that the optical receptacle 300 with embodiment 1 is identical with optical module 100, also the description thereof will be omitted to be marked with identical symbol.
Fig. 9 is the sectional view of the optical module 500 of embodiment 2.In Fig. 9, in order to represent the light path in optical receptacle 600, eliminate the hacures on the section of optical receptacle 600.Figure 10 is the figure of the structure of the optical receptacle 600 representing embodiment 2.Figure 10 A is the vertical view of optical receptacle 600, and Figure 10 B is upward view, and Figure 10 C is right side view.
As shown in Figure 9, the optical module 500 of embodiment 2 has photoelectric conversion device 700 and optical receptacle 600.In the optical module 500 of embodiment 2, under the state of optical fiber 400 in the connector 610 being accommodated in oversensitive blanket type, be installed on optical receptacle 600 by known installing component.
Photoelectric conversion device 700 has multiple light-emitting component 220, multiple photo detector 230 and control module 240.Multiple light-emitting component 220 is arranged in row on semiconductor substrate 210.In Fig. 9, multiple light-emitting component 220 is arranged in row from the side direction inboard, front of paper.On the other hand, multiple photo detector 230, in the mode parallel with the orientation of multiple light-emitting component 220, semiconductor substrate 210 is arranged in row.In mutually corresponding mode, configure multiple light-emitting component 220 and multiple photo detector 230 with identical interval.Multiple photo detector 230 accepts the supervision light Lm being used for monitoring the output etc. of the light-emitting component 220 of correspondence.
Optical receptacle 600, with the structure according to such photoelectric conversion device 700 and optical fiber 400, is guaranteed the mode of the light path between each light-emitting component 220 and each optical fiber 400 and the light path between each light-emitting component 220 and each photo detector 230 and is formed.Specifically, in optical receptacle 600, to guarantee the mode of the light path of the laser L of each light-emitting component 220, arrange multiple first optical surface 310, multiple second optical surface 340 and multiple 3rd optical surface 350 at the fore-and-aft direction (being above-below direction in Figure 10 A, Figure 10 B) of the paper of Fig. 9.In addition, in optical receptacle 600, reflecting surface 320 and light separation unit 330 are formed as the size of the light path can guaranteeing the laser L penetrated from multiple light-emitting component 220.
(effect)
As mentioned above, the optical module 500 of embodiment 2, can also the hyperchannel that sends of the corresponding light with monitoring except having the effect of embodiment 1.
(variation)
In the same manner as the variation of embodiment 1, in the optical receptacle 600 of embodiment 2, the light of incidence also can be transformed to the light beyond collimated light by the first optical surface 310.
Figure 11 is the sectional view (index path) of the optical module 500 of the variation 1 ~ 3 of embodiment 2.Figure 11 A is that the first optical surface 310 converts laser L to make the index path along with the optical module 500 when beam diameter of advancing increases gradually, Figure 11 B is that the first optical surface 310 converts laser L to make the index path along with the optical module 500 when beam diameter of advancing reduces gradually, and Figure 11 C is that the first optical surface 310 converts laser L to make the index path along with the optical module 500 when beam diameter of advancing reduces gradually.
As shown in Figure 11 A, in the optical module 500 of variation 1, the first optical surface 310 converts the light beam of laser L to make along with beam diameter of advancing towards direct of travel front increases gradually.In addition, as shown in Figure 11 B, in the optical module 500 of variation 2, the first optical surface 310 converts the light beam of laser L to make along with beam diameter of advancing towards direct of travel front reduces gradually.And then, as shown in Figure 11 C, in the optical module 500 of variation 3, owing to effectively having assembled light L before arrival the 3rd optical surface 350, therefore do not need by the 3rd optical surface 350, light L to be assembled.
In addition, do not illustrate especially, but in embodiment 2 also in the same manner as embodiment 1, the first optical surface 310, second optical surface 340 or the 3rd optical surface 350 also can be plane.
In addition, in the optical receptacle 300,600 of the respective embodiments described above, also can form the reflectance coatings such as the film of the higher metal of light reflectivity (such as, Al, Ag, Au etc.) on reflecting surface 320 and segmented reflector face 331.When wanting the reduction of privileged components number of packages, preferably as embodiment 1,2, adopt the structure only utilizing total reflection.
Industrial applicibility
Optical receptacle of the present invention and optical module are useful for using the optical communication of optical fiber.

Claims (7)

1. an optical receptacle, it is configured between photoelectric conversion device and optical fiber, for the end face of light-emitting component and described optical fiber is carried out optical bond, on substrate, be configured with described light-emitting component and the photo detector for monitoring the light penetrated from described light-emitting component in this photoelectric conversion device, this optical receptacle has:
First optical surface, makes the light incidence penetrated from described light-emitting component;
Reflecting surface, makes to reflect from the light of described first optical surface incidence to the direction along described substrate;
Recess, it has the injection region making to be penetrated by a part for the light of described reflective surface and the plane of incidence making the light incidence from the injection of described injection region;
Light separation unit, be configured in described injection region, light by described reflective surface is separated into the flashlight towards the supervision light of described photo detector and the end face towards described optical fiber, described supervision light is reflected to described photo detector, described flashlight is penetrated to described recess;
Second optical surface, make by described smooth separate section from after described supervision light penetrate to described photo detector; And
3rd optical surface, makes to penetrate from the described flashlight of described plane of incidence incidence to the end face of described optical fiber by from after described smooth separation unit injection,
Described smooth separation unit has: multiple segmentation transmission plane, makes by the Transmission light of described reflective surface and penetrates to described recess; And multiple segmented reflector face, be formed in the region different from multiple described segmentation transmission plane, and make to be reflected to described second optical surface by the light of described reflective surface,
Described segmentation transmission plane is the vertical plane vertical with the optical axis of the light by described reflective surface,
Described segmented reflector face is the dip plane of the inclined light shaft relative to the light by described reflective surface,
At the first direction of the vergence direction as described segmented reflector face with along described segmented reflector face and the second direction orthogonal with described first direction, alternately configure described segmentation transmission plane and described segmented reflector face.
2. optical receptacle as claimed in claim 1, wherein,
Described smooth separation unit has the rounding table terrace be connected with described segmented reflector face by described segmentation transmission plane further at the vergence direction in described segmented reflector face,
Described rounding table terrace is the parallel surface parallel with the optical axis of the light by described reflective surface,
Described segmented reflector face, described segmentation transmission plane and described rounding table terrace alternately configure to become rectangular mode with described second direction at described first direction.
3. optical receptacle as claimed in claim 1, wherein,
There is multiple described first optical surface being arranged in row, multiple described second optical surface being arranged in row and be arranged in multiple described 3rd optical surface of row.
4. an optical module, has:
Photoelectric conversion device, it is configured with light-emitting component and the photo detector for monitoring the light penetrated from described light-emitting component on substrate; And
Optical receptacle according to claim 1.
5. an optical module, has:
Photoelectric conversion device, it is configured with light-emitting component and the photo detector for monitoring the light penetrated from described light-emitting component on substrate; And
Optical receptacle according to claim 2.
6. an optical module, has:
Photoelectric conversion device, it is configured with light-emitting component and the photo detector for monitoring the light penetrated from described light-emitting component on substrate; And
Optical receptacle according to claim 3.
7. the optical module according to any one of claim 4 ~ 6, wherein,
Described photoelectric conversion device has: the multiple described light-emitting component being arranged in row; And the multiple described photo detector of row is arranged in the mode parallel with the row of described light-emitting component,
Described optical receptacle has: be arranged in multiple described first optical surface of row accordingly with the row of described light-emitting component; Multiple described second optical surface of row is arranged in accordingly with the row of described photo detector; And be configured to multiple described 3rd optical surface of row.
CN201410320195.8A 2013-07-08 2014-07-04 Optical receptacle and optical module Active CN104280839B (en)

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US20150010272A1 (en) 2015-01-08
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